STRUCTURE OF THE EARTH

So, we know the layers of the atmosphere, right? We also know about the hydrosphere.  What about the sphere that we actually walk on?

The lithosphere is the solid, outer part of the Earth, including the brittle upper portion of the mantle and the crust.  The lithosphere is the coolest and most rigid part of the Earth. 

Check out this cool website:

 https://www.dkfindout.com/us/earth/structure-earth/